nonconfigurable-nonenumerable-nonwritable-descriptors-basic.js (857B)
1 // Copyright (C) 2017 Caio Lima. All rights reserved. 2 // This code is governed by the BSD license found in the LICENSE file. 3 4 /*--- 5 description: Mapped arguments property descriptor change with non-configurable, non-enumerable and non-writable property 6 info: | 7 Mapping stop working when property is set to non-writable. The 8 descriptor's enumerable property is the one set before the mapping removal. 9 flags: [noStrict] 10 esid: sec-arguments-exotic-objects-defineownproperty-p-desc 11 includes: [propertyHelper.js] 12 ---*/ 13 14 function fn(a) { 15 Object.defineProperty(arguments, "0", {configurable: false, enumerable: false, writable: false}); 16 17 // Postcondition: Arguments mapping is removed. 18 a = 2; 19 20 verifyProperty(arguments, "0", { 21 value: 1, 22 writable: false, 23 enumerable: false, 24 configurable: false, 25 }); 26 } 27 fn(1); 28 29 30 reportCompare(0, 0);